Ecological impacts of lead mining on Ozark streams: Toxicity of sediment and pore water
Ecological impacts of lead mining on Ozark streams: Toxicity of sediment and pore water
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DOI：
10.1016/j.ecoenv.2008.05.013
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发表时间：
2009-02-01
影响因子：
6.8
通讯作者：
Ingersoll, Christopher G.
中科院分区：
文献类型：
--
作者：
Besser, John M.;Brumbaugh, William G.;Ingersoll, Christopher G.
我们研究了密苏里州东南部铅锌矿区下游沉积物的毒性，使用慢性沉积物毒性测试与片足类，Hyalella azteca，和孔隙水毒性测试与水蚤，Ceriodaphnia dubia。2002年进行的试验证明，在采矿区附近采集的溪流沉积物中，片足类动物的存活率降低，在大多数试验的孔隙沃茨中，水蚤的存活率和繁殖率降低。2004年进行的额外片脚类动物测试记录了矿区下游三条河流的沉积物的显著毒性影响：斯特罗瑟溪、西福克黑河和比福克。最大的毒性发生在沉积物从6公里的上游斯特罗瑟溪，但在所有三个流域的采矿下游至少14公里处收集的沉积物中发生了重大的毒性影响。毒性效应与沉积物和孔隙沃茨中的金属浓度（镍、锌、镉和铅）显著相关，并且与基于沉积物质量准则的金属毒性风险预测基本一致，尽管氨和锰也可能在少数地点导致毒性。端足类在沉积物毒性试验中的反应与研究溪流中底栖无脊椎动物群落特征显著相关。这些结果表明，与沉积物相关的金属的毒性有助于在流排水荚趋势矿区的不利生态影响。爱思唯尔公司出版
We studied the toxicity of sediments downstream of lead-zinc mining areas in southeast Missouri, using chronic sediment toxicity tests with the amphipod, Hyalella azteca, and pore-water toxicity tests with the daphnid, Ceriodaphnia dubia. Tests conducted in 2002 documented reduced survival of amphipods in stream sediments collected near mining areas and reduced survival and reproduction of daphnids in most pore waters tested. Additional amphipod tests conducted in 2004 documented significant toxic effects of sediments from three streams downstream of mining areas: Strother Creek, West Fork Black River, and Bee Fork. Greatest toxicity occurred in sediments from a 6-km reach of upper Strother Creek, but significant toxic effects occurred in sediments collected at least 14 km downstream of mining in all three watersheds. Toxic effects were significantly correlated with metal concentrations (nickel, zinc, cadmium, and lead) in sediments and pore waters and were generally consistent with predictions of metal toxicity risks based on sediment quality guidelines, although ammonia and manganese may also have contributed to toxicity at a few sites. Responses of amphipods in sediment toxicity tests were significantly correlated with characteristics of benthic invertebrate communities in study streams. These results indicate that toxicity of metals associated with sediments contributes to adverse ecological effects in streams draining the Viburnum Trend mining district. Published by Elsevier Inc.